/*
* Copyright (c) 2011 Connection Road.  All rights reserved.
* This program and the accompanying material are made available
* under the terms of the Eclipse Public Licnese v1.0 which is
* available at http://www.eclipse.org/legal/epl-v10.html
*/

using System.Collections.Generic;
using System.Xml.Serialization;

namespace CrSyncFilesUtils
{
    [XmlRoot("dictionary")]
    public class CrSyncSerializableDictionary<TKey, TValue> : Dictionary<TKey, TValue>, IXmlSerializable
    {

        #region IXmlSerializable Members
        public System.Xml.Schema.XmlSchema GetSchema()
        {
            return null;
        }



        public void ReadXml(System.Xml.XmlReader reader)
        {
            var keySerializer = new XmlSerializer(typeof(TKey));
            var valueSerializer = new XmlSerializer(typeof(TValue));
            bool wasEmpty = reader.IsEmptyElement;
            reader.Read();
            if (wasEmpty)
                return;
            
            while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
            {

                reader.ReadStartElement("item");
                reader.ReadStartElement("key");
                
                var key = (TKey)keySerializer.Deserialize(reader);
                
                reader.ReadEndElement();
                reader.ReadStartElement("value");
                
                var value = (TValue)valueSerializer.Deserialize(reader);
                
                reader.ReadEndElement();
                Add(key, value);
                reader.ReadEndElement();
                reader.MoveToContent();
            }

            reader.ReadEndElement();

        }
        
        public void WriteXml(System.Xml.XmlWriter writer)
        {
            var keySerializer = new XmlSerializer(typeof(TKey));
            var valueSerializer = new XmlSerializer(typeof(TValue));
            
            foreach (TKey key in this.Keys)
            {
                writer.WriteStartElement("item");
                writer.WriteStartElement("key");
                keySerializer.Serialize(writer, key);
                writer.WriteEndElement();
                writer.WriteStartElement("value");
                
                var value = this[key];
                valueSerializer.Serialize(writer, value);
                writer.WriteEndElement();
                writer.WriteEndElement();
            }

        }

        #endregion

    }
}